When is light penetration in a river or stream likely to be lowest

A. The source

B. The mouth

C. The middle portion

D. None of the above

How many total, non-unique alleles are there for each gene in a population of 400 humans? 200 1600 800 400

Two respiratory disorders associated with respiratory system

A chromosome has an inversion. Which describes a pericentric inversion? deletion of genes within the same chromosome arm switching of genes within the same chromosome arm switching of genes around the centromere deletion of genes around the

What happens when one organism is taken out of the food chain? How does it affect others?

Unlike endocrine glands, exocrine glands?

Which organism's are omnivores? A) The snake, the bear, and the fish B) The fish and the eagle C) The bear and the fish D) The snake and the mouse If an omnivore is an animal that eats both plants and animals, I'd choose D because all the other

How are all humans similar?

Why does earth have such a diversity of plant and animal life? give three reasons.

After sequencing a molecule of dna, you discover that 20% of the bases are cytosine. what percentage of the bases would you expect to be thymine? explain why.

Kidneys that can conserve water are essential to homeostasis because: a) some animals live in dry or salty environments. b) some animals drink water.